\hypertarget{apply__fft1_8m}{
\section{apply\_\-fft1.m File Reference}
\label{apply__fft1_8m}\index{apply\_\-fft1.m@{apply\_\-fft1.m}}
}


Apply Fast Fourier transform to the Radon image.  


\subsection*{Functions}
\begin{DoxyCompactItemize}
\item 
rets \hyperlink{apply__fft1_8m_a2317ac3c592340b05f8b6a2a74f9e8b6}{apply\_\-fft1} (type Radon, type \hyperlink{start__simulation_8m_a73585d7121de037cf2e2ca12b27eb83e}{DEBUG})
\begin{DoxyCompactList}\small\item\em Apply FFT to each columns of the matrix, then shifts the DC to the DFT centre. \item\end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}
Apply Fast Fourier transform to the Radon image. 

Definition in file \hyperlink{apply__fft1_8m_source}{apply\_\-fft1.m}.



\subsection{Function Documentation}
\hypertarget{apply__fft1_8m_a2317ac3c592340b05f8b6a2a74f9e8b6}{
\index{apply\_\-fft1.m@{apply\_\-fft1.m}!apply\_\-fft1@{apply\_\-fft1}}
\index{apply\_\-fft1@{apply\_\-fft1}!apply_fft1.m@{apply\_\-fft1.m}}
\subsubsection[{apply\_\-fft1}]{\setlength{\rightskip}{0pt plus 5cm}rets apply\_\-fft1 (
\begin{DoxyParamCaption}
\item[{type}]{Radon, }
\item[{type}]{DEBUG}
\end{DoxyParamCaption}
)}}
\label{apply__fft1_8m_a2317ac3c592340b05f8b6a2a74f9e8b6}


Apply FFT to each columns of the matrix, then shifts the DC to the DFT centre. 

The value of axis\_\-omega\_\-s in each row is defined by the formula axis\_\-omega\_\-s = x $\ast$ (2$\ast$pi / dx) where dx=1. 
\begin{DoxyParams}{Parameters}
{\em Radon} & Radon image. Number of rows must be the power of 2 for FFT to work. \\
\hline
{\em DEBUG} & Debug mode. Save the Fourier\_\-Radon image in real part and imaginary part. \\
\hline
\end{DoxyParams}

\begin{DoxyRetVals}{Return values}
{\em Fourier\_\-Radon} & Radon image in Fourier Space \\
\hline
{\em axis\_\-omega\_\-s} & value of omega\_\-s in each row \\
\hline
\end{DoxyRetVals}


Definition at line \hyperlink{apply__fft1_8m_source_l00016}{16} of file \hyperlink{apply__fft1_8m_source}{apply\_\-fft1.m}.

